Since late 2001, there have been .12 American combat deaths per division day in Afghanistan. During the Vietnam war, the average division lost 3.2 troops a day, which was similar to the losses suffered in Korea (1950-53). In Iraq, the losses have been .44 deaths per division per day.
By comparison, during World War II the daily losses per American averaged (over 400-500 combat days) about twenty soldiers per day. On the Russian front, German and Russian divisions lost several times that, and often over a hundred a day for weeks on end.